Revolution-counter.



0. D. HAPGGOD.

REVOLUTION COUNTER.

APPLICATION FILED MAYIa. 1914.

1 172,793. Patented Feb. 22, 1916.

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l 1 By A TTORNEY THE COLUMBIA PLANOGRAPH co.. WASHINUTDN, D. c.

UNTTED sTATEs PATENT OFFICE.

OSCAR D. HAPGOOD, OF ORANGE, MASSACHUSETTS, ASSIGNOB T0 GOODELL-PRATT COMPANY, 0F GREENFIELD, MASSACHUSETTS.

REVOLUTION-COUNTER.

Specification of Letters Patent.

Patented Feb. 22, 1916.

Application filed May 13, 1914. Serial No. 838,255.

To au 'u2/wm t may Concern.

Be it known that I, OSCAR D. Harcoou, a citizen of the United States, residing at Orange, Massachusetts, have invented new and useful Improvements in Revolution- Oounters, of which the following is a specification.

This invention relates to a revolution counter for counting the revolutions of machine shafts and the like.

One of the objects of the invention is to provide a. device of this character' which may be used right or left handed with equal ease.

Another object of the invention is to provide a device in which the complete number of hundreds of revolutions of the shaft will be indicated.

Other objects are to provide a counter which will be comparatively simple in operation and manufacture, which will be positive in its action, and which will not be liable to get out of order.

Other objects will in part be obvious and in part be pointed out hereinafter.

In the accompanying drawing, showing an illustrative embodiment of the invention and in which the same reference numerals refer to similar parts in the several figures, Figure 1 is an elevational view of the device. Fig. 2 is a sectional view taken on the line 2 2 of Fig. 3. Fig. 3 is a sectional View taken on the line 3 3 of Fig. 1. Fig. 4 is a sectional view taken on the line 4 4 of Fig. 2. Fig. 5 is a sectional view taken on the line 5 5 of Fig. 4. Fig. 6 is a detail perspective view of one of the dials.

Referrinv to the drawings, 1 indicates a casing, preferably of dle 2 is mounted. The spindle has both of its ends projecting from the casing and they are preferably pointed as indicated at 3 whereby they are adapted to engage the shaft, the revolutions of which are to be counted. As shown one of the ends 4 of the spindle is preferably formed of a separate piece and is secured in position by a pin 5. Adjacent each of the projecting ends of the spindle the casing 1 is provided with pins 6 adapted to engage a bayonet slot 7 in a handle 8, which handle is hollow and adapted to fit over either one of the ends of the spindle. It will be understood that the handle 8 is placed over either end of the spindle 2 and secured to the casing 1 by means of metal, in which a spinthe pins 6 and bayonet slot 7 depending on whether the counter is to be used right handed or left handed.

The spindle 2 is provided intermediate its ends with a worm 9 adapted to engage an annular worm wheel 10 which is positioned in an annular recess 11 provided in the casing 1 and which is journaled upon the intervening cylindrical portion 12 of the casing which forms a stub shaft. Secured to the outer surface of the worm wheel 10 in any suitable manner, as for example by a pin 13, is an annular dial member 14 provided with the usual marks for indicating the number of revolutions of the spindle 2. As shown, the dial member 14 is provided with one hundred marks from which it will, of course, be understood that it will make a complete revolution for every one hundred revolutions of the spindle.

Rotatably mounted upon the reduced outer end portion of the stub shaft 12 in the casing 1 is a second annular dial member 15 which member bears numerals from zero to nine, and the purpose of which member is to indicate the number of complete revolutions of the dial member 14. A plate 16 provided with an aperture 17 overlies the number bearing surface of the dial 15 and is held in position upon the casing 1 in any suitable manner, as for example, by a screw 18. The plate 16 is prevented from rotatin by means of a pin 19 which is secured t ereto and which engages a recess in the casing. The number upon the dial 15 indicating the complete number of revolutions of the dial 14 will be visible through the aperture 17 of the Aplate 16.

TheY manner in which the dial l5 is actuated will now be described: The dial 15 is provided with an inwardly extending annular portion 20 provided in its periphery with notches 21, and having a diameter substantially equal to the diameter of the cylindrical body portion of the shaft 12. The worm wheel. 10 is provided with a recess 22 in which a spring 23 is mounted, which sp1-ing engages a pawl 24 adapted to ride in a slot 25. The spring normally urges the pawl inward into engagement with the periphery of the shaft 12 of the casing. This shaft 12 is provided with a recess 26 into which the spring 23 forces the pawl 24 during each revolution of the Worm wheel 10. When the pawl 24 is forced into the recess 26 it will engage one of the notches 2l in the annular portion 20 of the dial 15, and, While so locked with the dial l5, further rotation of the worin Wheel l will of course cause a rotation of the dial l5. The cut-out portion or recess 2G is of such a length that the pawl Will rotate the dial l5 a distance equal to the distance between adjacent numerals ap pearing on its face.

lit will thus be seen from the above description that for eyery rei/'elution of the Worm `Wheel l() andthe dial lil attached thereto, the dial l5 vill he rotated a distance correspending1 to the distance between adjacent numerals thereon, and tl at, therefore, the numeral on the dial l5 Which is visible through the aperture l? indicates the number of complete reif'olutions of the dial 14:, or in other words, the number of hundreds of revolutions of the spindle 2 and therefore of the shaft, the revolutions of which are to be counted. ln order to preyont the dial l* from being inadvertently rotated, it is held in position by meal s of a spring; pressed ball 27 'positioned in recess of the casing,l l, and adapted to engage any one of a number of recesses 29 formed on the lower surface of the annular member 2G. The soring which presses the ball into its locking position will, of course, yield and permit the rotation of the dial l5 when acted upon by the paul 2i, as above described. rlhe dial l5 is prefer bly provided with a, knurled flange or rim 30 which may be grasped by the fingers to rotate the dial when it is desired to set it back to its zero "position,

Hai/'ing described this invention in connection with the illustrative embodiment thereof, to the details of which disclosure this invention is not, of course, to be limited, what is claimed as neuT and what is desired to be secured by Letters Patent is set forth in the appended claims:

l. ln a reyolution counter, in combination, a casing having an annular recess in one of its exterior faces, the intervening casing portion forming a stub shaft, a spindle rotatably mounted in said casing', an annular dial rotatably mounted Within said recess upon the said shaft and being connected operatively With the said spindle to indicate the number of revolutions of the same, the said shaft hai/'ing' a reduced outer end portion, the said dial and the casing being provide-d with cooperating indicating` means, and a second annular dial rotatably mounted Within the casina' recess uoon the reduced shaft end inwardly of the first dial and concentric thereto, the second dial being connected with the first dial to indicate the number of revolutions of the latter, the sec ond dial and the stub shaft hayiiw co5 3er-V ating indicating),n means.

in a revolution counter, in combination, a. casing, having an annular recess in one of its exterior faces, the :intervening casing portion forming a stub shaft, a spindle rotatably mounted in said casing', an annular dial rotatably mounted within said recess upon the said shaft and being' connected operatively with the said spindle to indicate the number of revolutions of the same, 'the said shaft having' a reduced outer end portion, the said dial and the casing' being proided with coperating indicating means, a second annular dial rotatably mounted Within the casing; recess upon the reduced shaft end inwardly of the dial. and concentric thereto, the second dial being connected With the first dial. to i icate the number of revoiutions of the latter, the second dial. and the stub `shaft having cooperating indicating means, the second dial also having' a radially projecting' portion overlying,` the outer face of the first dial.

ln testimony whereof l have signed my name to this specification in the presence of two subscribing Witnesses.

OSCAR D. HAPGOOD.

vlvlitnesses @nannies D. SnvnnaNon, ALLEN P. JONES.

Copies of this patent may be obtained for ve cents each, by addressing' the Sommissioner ,of Patents,

` lifashing'ton, C, 

